32results about How to "Flexible and reliable control" patented technology

The invention discloses a vehicle charging converter with high efficiency. The vehicle charging converter with high efficiency includes successively connected EMI circuit, a PFC circuit, an inversioncircuit, a rectification circuit, an output circuit and a control circuit, wherein the EMI circuit is used for reducing the influence of high frequency noise of the converter on the power grid; on thepremise of guaranteeing the quality of the input current, the PFC circuit can convert the single phase alternating current into the high voltage direct current; the inversion circuit converts the high voltage direct current into high frequency square wave which is adjustable in frequency; the rectification circuit performs rectification after performing transformer isolation of the rectificationcircuit to obtain stable direct current voltage; and finally the high frequency current ripple is filtered and then is output by the output circuit, and the control circuit completes acquisition, calculation and output of the controlled quantity of the converter, and then operating and protection of the vehicle charging converter can be realized. In the vehicle charging converter with high efficiency, the PFC circuit and the inversion circuit respectively use GaN HEMT and Si MOSFET as the main switch devices; by means of combination with the advantages of a wide-gap semiconductor device and atotem PFC topology, the vehicle charging converter with high efficiency has the advantages of being good in the grid side harmonic wave characteristic, being small in volume, being flexible in control, and greatly improving the conversion efficiency of vehicle charging.

The invention is a current-equalizing pneumatic heat exchanging bed for a circulating fluidized bed boiler (CFBB), comprising a feed bin 1, a high-temperature bin 2, a current-equalizing bin 3, a heat exchanging bin 4, a low-temperature bin 5, a wind box 16 of each bin and the bottom part thereof, an air distributor 15, a hood 14, an air duct 18 and a wind speed control device 19 to form an independent and operable integral. The shunting ratio of circulating ash can be controlled by adjusting wind speed of each bin, part of circulating ash directly goes back to a furnace 20, and the other part thereof goes back to the furnace 20 after being cooled by a heating surface 6. The invention uses a pneumatic method for realizing shunting and controlling of the circulating ash, has the advantages of wide adjusting range, evenly heat exchanging, no abrasion and tube explosion and mechanical fault, and is applicable to large-scale circulating fluidized bed boiler (CFBB).

The invention provides a ground cleaner and a control method thereof. The ground cleaner comprises a walking sweeping module, a fan module, an image shooting module and a control device, wherein the walking sweeping module is configured to be driven by an internal driving device to move on the ground in a to-be-swept area so as to execute cleaning; the fan module is detachably arranged above the walking sweeping module to produce airflow for sucking dust on the ground into the walking sweeping module; the image shooting module is arranged above the fan module and used for shooting images of the surrounding environment of the walking sweeping module; the control device is configured for acquiring the images and adjusting moving states of the walking sweeping module through the driving device according to the images, and the walking sweeping module is enabled to change the moving direction and / or the moving speed. With the adoption of the scheme, on one hand, all parts can be flexibly assembled, the structure is simple, and the assembling is convenient; on the other hand, the ground cleaner is flexible and convenient to control and is convenient to use.

The invention provides a synthetic jet actuator which performs periodic air blowing and suction through repeated oscillation of a piezoelectric film to convert consumed electric energy into fluid kinetic energy. The synthetic jet actuator comprises a cavity, the long-strip-shaped piezoelectric film, a long-strip-shaped piezoelectric actuator and an air bleeding channel; the cavity has a lower opening and an upper opening; the area of the section of the lower opening is larger than that of the section of the upper opening; the long-strip-shaped piezoelectric film covers the lower opening in a matched manner; the long-strip-shaped piezoelectric actuator is arranged below the piezoelectric film; the air bleeding channel is connected with the upper opening in a matched manner; and the long-strip-shaped piezoelectric actuator is driven by a rectangular pulse signal to have the inverse piezoelectric effect, the piezoelectric film is driven to oscillate up and down periodically, air in the cavity oscillates along with the piezoelectric film, and then the periodic air blowing and suction effect is produced in the air bleeding channel. The invention further provides a horizontal-axis wind turbine blade comprising the synthetic jet actuator. By the aid of the blade, flowing control can be realized, so that the strength of the trailing vortex of a wind turbine is reduced, the dissipationof the trailing vortex is accelerated, oscillation of the wind turbine blade is reduced, and the service life of the wind turbine is prolonged.

The invention provides a pipeline inspection robot for a nuclear steam generator, which comprises two pawing mechanisms hinged with an upper cantilever via a driving shaft and a lower cantilever via a driven shaft. The upper cantilever is composed of two segments which are hinged with each other via a driving shaft; the lower cantilever is composed of two segments which are hinged with each othervia a driven shaft; a motor is connected with the lower ends of both the driving shaft between the upper cantilever and the two pawing mechanisms and the driving shaft between the two segments of theupper cantilever; and a potentiometer is arranged at the upper end of each driving shaft and is connected with a sensor guide arm which is hinged with a fixed column fixed on the upper cantilever. The pipeline inspection robot has the following advantages: small volume, so as to be easy to be put into the steam generator by an operator through a narrow manhole; convenient energy availability, andflexible and reliable control; cantilever structure with a relatively large working radius after being unfolded; low requirements for the motor, and reliable operation; and good adaptability of replacement parts to different apertures and aperture plates.

A master-slave operation mechanical arm control master manipulator comprises a mechanical shell, a handle and a plurality of joint sensors, wherein the mechanical shell comprises a bottom shaft assembly, a second shaft assembly, a second-third shaft connecting part assembly, a third shaft assembly, a fourth shaft assembly and a fifth shaft assembly, a switching circuit board is embedded in the bottom shaft assembly, and a driving circuit board and a control card board are embedded in the handle; and the switching circuit board is electrically connected with an external master-slave controllerthrough an aviation connector, the control card board is electrically connected with the switching circuit board through serial port communication and connection interfaces, the driving circuit boardis electrically connected with the switching circuit board through servo driving communication and connection interfaces, the joint sensors are used for collecting angle signals of swing motion, and each joint sensor comprises an encoder and a servo steering engine. Complex master arm signal transmission can be achieved, and multiple degrees of freedom and multiple switch button signals are achieved.

The invention belongs to the technical field of non-ferrous metal cast rolling production, and relates to aluminum strip cast rolling hydraulic controlled casting and controlled rolling equipment andmethod. According to the equipment, casting rollers are locked in a determined plane through a lifting hydraulic cylinder and a roller adjusting hydraulic cylinder, and casting roller seams, the lifting hydraulic cylinder and the roller adjusting hydraulic cylinder can operate according to a determined mathematical relationship; position sensors are installed in the lifting hydraulic cylinder andthe roller adjusting hydraulic cylinder; the casting rollers and a bearing seat are connected with the lifting hydraulic cylinder and the roller adjusting hydraulic cylinder respectively; the hydraulic controlled casting and controlled rolling equipment further comprises a rack, all the equipment bodies are connected into a closed whole through the rack; and the hydraulic system is provided with ahydraulic sensor and a pressure sensor. According to the equipment, flexible and controllable roll seams can be formed between the casting rollers, the roller seam adjusting capacity of the casting rollers is improved, the cast rolling capacity of the casting rollers can be effectively improved, efficient cast rolling production is met, and the quality of produced products is guaranteed.

The invention discloses an electromechanical equipment monitoring system for urban rail transportation. The system is composed of a main control server and a plurality of sub control servers that arein network connection. The main control server consists of a storage module and a dispatch instruction response module. Each sub control server includes a parameter monitoring module and is used for collecting an operation state of electromechanical equipment monitored by the sub control server at a current time in real time, inquiring a system linkage control strategy table of the main control server in real time, comparing the operation state of the electromechanical equipment at the current time with the system linkage control strategy table, acquiring a comparison result indicating normaloperation or abnormal operation of the electromechanical equipment, and carrying out linkage controlling on the electromechanical equipment based on the comparison result. The electromechanical equipment monitoring system has characteristics of high efficiency and stability, high degree of automation, and high flexibility and reliability.

The invention relates to the field of fermentation engineering, and relates to a fermentation tank and a dry anaerobic fermentation system comprising the same and cooperatively processing municipal domestic waste and municipal sludge and a dry anaerobic fermentation method. The system comprises a material mixing injection system, an anaerobic fermentation system, a re-circulating system and a discharging and dehydrating system, wherein the municipal domestic waste, the municipal sludge, agricultural waste and other complex organic wastes are cooperatively subjected to anaerobic digestion treatment with high solid content, so that the treatment way of the municipal domestic waste is found, the waste is changed into wealth, and a new energy source is provided.

The invention provides a water heater and a control method of the water heater. The water heater comprises a heat pump heating system and an electric heating system. The control method of the water heater comprises the steps of obtaining environmental parameters of the environment where the water heater is located; matching the environmental parameters with a plurality of preset execution conditions to obtain execution conditions matched with the environmental parameters; according to the matched execution conditions, determining control modes corresponding to the environmental parameters, wherein control parameters used for adjusting the running state of the heat pump heating system and / or the electric heating system are preset in the control modes; and according to the preset control parameters presetin the determined control modes, adjusting the running state of the heat pump heating system and / or the electric heating system. According to the scheme, the control modes corresponding to the environmental parameters are used for adjusting the running state of the water heater, and therefore the parameters can be flexibly controlled according to the specific use environment; and on one hand, the water using requirement of a user can be met, and on the other hand, work efficiency and use reliability of the water heater can be improved.

The invention provides a hybrid micro-grid system based on a virtual synchronous motor. The hybrid micro-grid system based on the virtual synchronous motor is characterized by comprising an alternating current subnet, a direct current subnet, a coupling converter unit, an alternating current load and a direct current load, wherein the alternating current load is connected with the alternating current subnet; the direct current load is connected with the direct current subnet; the coupling converter unit is connected with the alternating current subnet through an alternating current distribution bus; the coupling converter unit is connected with the direct current subnet through a direct current distribution bus; the alternating current subnet is connected with the alternating current distribution bus through an alternating current line impedor; and the direct current subnet is connected with the direct current distribution bus through a direct current line impedor. The invention provides a coordinated control method for the hybrid micro-grid system. According to the coordinated control method provided by the invention, the characteristics of reasonable optimized allocation of tidalcurrent of the alternating and direct current subnets, stable running regions, capacity limitation and the like are fully considered; the power utilization demands of different users can be adapted;and virtual inertia is provided to ensure system voltage / frequency stability.

The invention relates to a hydraulic control system for rotation of an excavator in order to solve the problem that energy overflow loss exists when an existing hydraulic excavator is started in a rotation mode. The hydraulic control system for rotation of the excavator comprises a rotary motor assembly, a main pump, a first three-position four-way solenoid directional valve, a main pump proportional electromagnetic valve, a main pump pressure sensor, a guide handle and a controller. A pump inlet of the main pump is connected with a port P of the first three-position four-way solenoid directional valve. A port A and a port B of the first three-position four-way solenoid directional valve are connected with a port A and a port B of the rotary motor assembly correspondingly. The control output end of the guide handle and the main pump pressure sensor are connected with the input end of the controller. The electromagnet control input end of the first three-position four-way solenoid directional valve is connected with the output end of the controller. The hydraulic control system for rotation of the excavator has the advantages that a small number of components are additionally arranged, the technology is relatively mature, the cost is low, an electronic control system and the hydraulic control system are combined, control is flexible and reliable, the energy utilization rate is high, the start overflow loss is reduced, and the energy saving effect is obvious.

The invention discloses a vehicle-mounted wireless charging control system and method, and relates to the technical field of wireless charging control. The system comprises a first temperature detection module, a second temperature calculation module, a charging control module, a coil, and an alarm module. The first temperature detection module is connected with the input end of the second temperature calculation module; the second temperature calculation module is connected with the input end of the charging control module; the charging control module is used for controlling the charging process; the coil is connected with the first output end of the charging control module; and the alarm module is connected with the second output end of the charging control module. According to the invention, theoretical dynamic calculation is carried out on the inside and outside temperature difference, the accurate temperature outside a vehicle-mounted wireless charging controller shell is obtained, and a more accurate judgment basis is provided for the reliable wireless charging process control; a battery is adopted as a driving backup energy source, so that it is guaranteed that a charging clamp can still work when a vehicle flames out; the wireless charging process is flexibly and reliably controlled, and the safety and reliability of the whole system are improved.

The invention relates to a long-stroke hydraulically-controlled compressor in natural gas industry. The invention adopts the technical scheme as follows: a primary gas inlet valve and a secondary gas inlet valve are mounted at the upper parts of two ends of a gas cylinder, wherein a primary gas outlet valve and a secondary gas outlet valve are mounted on the lower parts of two ends of the gas cylinder; a gas inlet pipeline is connected to the primary gas inlet valve; the primary gas outlet valve, a heat exchanger, a reversing valve and the secondary gas inlet valve are connected in series through a pipeline; the bottom of the gas cylinder is in flange connection with a piston ring; a head of the cylinder is in threaded connection with an end cover; one end of an oil cylinder sleeve is in threaded connection with the piston ring; the other end of the oil cylinder sleeve is in clearance fit with the end cover; one end of a piston rod is placed in an inner cavity of the oil cylinder in a clearance fit manner; a lug ring on one end of the piston ring is hinged to a rack; the gas cylinder is fixedly connected to the rack. The long-stroke hydraulically-controlled compressor is long in stroke; the liquid compact can be avoided; a moving part is low in speed, low in noise and long in service life; the compressor is wholly prized; a hydraulic control manner is adopted, so that the compressor is flexible and reliable to control; the compressor can be applied to processes of discharging water and extracting gas, mixing and conveying gas and liquid and recycling scattered gas; the compressor is highly adaptive to variable working conditions.

The invention relates to a cleaning device for cleaning workpieces (106), comprising at least one workpiece receptacle (114) for a workpiece to be cleaned. The aim of the invention is to provide a simple, flexible and reliable verification of the position of the workpiece. To achieve this, the cleaning device comprises at least one distance sensor (126) that generates a signal, said signal being used to deduce whether a workpiece is held in the correct position in the workpiece receptacle.

The invention discloses a self-driving drive circuit of a double-tube forward synchronous rectification circuit. The double-tube forward synchronous rectification circuit includes a transformer, a double-tube forward network on the primary side of the transformer, and a synchronous rectification transformation network on the secondary side of the transformer. The transformer includes the first primary winding, the first secondary winding and the second secondary winding; the self-driving drive circuit of the double-tube forward synchronous rectification circuit is used to drive the freewheeling tube in the synchronous rectification transformation network, by controlling the self-driving Drive the working state of the first P-type MOS tube in the driving circuit to drive the rectifier tube in the synchronous rectification conversion network. The driving voltage provides a path for the output inductor of the subsequent stage, which can improve the efficiency of the converter. At the same time, the driving voltage of the freewheeling tube can be adjusted to make the control more flexible and reliable.

The invention discloses a resistance-free medium wire feed pulsed power source and a processing method and gap discharge state recognition state thereof. A circuit comprises a power loop, a drive circuit, an FPGA controller, a voltage detection circuit and a current detection circuit. When a first switch pipe is turned on to the maximum wait breakdown time threshold value, the gap voltage in the time frame is detected, the average voltage is calculated, and of the average voltage is a floating voltage, a gap is recognized in an idling state; otherwise, the first switch pipe is turned off, after dead time, when a second switch pipe is turned on, the gap current is detected, changes of the current descending slope are calculated, if the slope change rate exceeds the descending slope change rate threshold value, the gap is recognized as a short circuit, and if the slope hardly changes or changes slightly, the gap is recognized as normal discharge; and according to the recognized gap state, necessary bases are provided for the feed direction and speed of a servo system. The recognition precision of the gap discharge state of the power source is improved, and then the processing efficiency and discharge rate of the power source are improved.

The invention discloses an automatic picking control method and a system of plate products, which can automatically pick the plate products off the line, and avoid disordered plates. The method comprises the following steps that: when a control unit receives a starting instruction sent by a user or once a second detecting unit detects the nonexistence of a lifting roll platform, controlling the lifting roll platform to be lifted to a highest allowable end, wherein the highest allowable end of the lifting roll platform is not higher than a roller conveyor; controlling the operation of the roller conveyor; when a first detecting unit detects the presence of a plate on the roller conveyor, sending a signal to the control unit: when the control unit receives the signal sent by the first detecting unit, after a given interval time, ordering the lifting roll platform to descend, wherein the given interval time needs to guarantee that after the plate is conveyed to the lifting roll platform,the lifting roll platform can descend; making sure that the descending height of the lifting roll platform is not smaller than the thickness of the plate; and when the second detecting unit detects that the lifting roll platform descends to a bottom end, stopping the off-line procedure by the control unit.

The invention is a current-equalizing pneumatic heat exchanging bed for a circulating fluidized bed boiler (CFBB), comprising a feed bin 1, a high-temperature bin 2, a current-equalizing bin 3, a heat exchanging bin 4, a low-temperature bin 5, a wind box 16 of each bin and the bottom part thereof, an air distributor 15, a hood 14, an air duct 18 and a wind speed control device 19 to form an independent and operable integral. The shunting ratio of circulating ash can be controlled by adjusting wind speed of each bin, part of circulating ash directly goes back to a furnace 20, and the other part thereof goes back to the furnace 20 after being cooled by a heating surface 6. The invention uses a pneumatic method for realizing shunting and controlling of the circulating ash, has the advantagesof wide adjusting range, evenly heat exchanging, no abrasion and tube explosion and mechanical fault, and is applicable to large-scale circulating fluidized bed boiler (CFBB).